CELESTRON Ultima 100 22-67x100 Spotter Model 52252 100 mm Refractor Spotting Scope Multi-Coated optics 45 degree viewing angle 22-66x zoom eyepiece Sight tube for quick targeting Waterproof Soft carrying case FEATURES 100 mm Refractor Spotting Scope Multi-Coated optics 45° viewing angle 22-66x zoom eyepiece Sight tube for quick targeting Waterproof Soft carrying case SPECIFICATIONS Magnification 22 - 66x Objective Lens Diameter 100mm (3.93") Eyepieces 8mm - 24mm (.31" - .94") Angular Field of View 1.8° - 1.0° Linear Field of View (@1000 yds) / @1000 m) 94 ft (28.6 m) @ 22x| 52 ft (15.8 m) @ 66x Focal Length 540mm (21.26") Exit Pupil 4.5mm - 1.5mm (.17" - .06") Eye Relief 18mm (.71") Close Focus 33 ft (10 m) Twilight Factor 82.1 - 47.4 Relative Brightness 19.7 - 2.2 Lens Coatings Multi-coated Prism Glass (Type) BaK-4 Prism Coatings FMC Weight 72 oz (2041 g) Environmental Protection Waterproof Nitrogen Filled Yes Tripod Adaptable Yes Carrying Case Padded green woven nylon view-through Camera Adaptable Yes Dimensions 540mm x 110mm x 180mm (21.3" x 4.3" x 7.1")